Hi:
?
As noted elsewhere, you'll need more attenuation in a form that can handle the power. I usually start my test chain with a 50db 100 watt attenuator and then add others as needed.
?
The neat built in function in the TinySA is really useful, but most amateur (and commercial) radio specifications for IMD are described in terms of the individual distortion components and how far below the "carrier" level they are in "dbc" the worst ones are - you may still need to examine the spectrum manually to determine the numbers you want.
?
The ARRL has a document describing how they conduct these measurements in their review labs and this is the usual way of arriving at the numbers used in their IMD measurements. It's important to set up the levels correctly for the tests.
?
?
I also have a number of short videos about doing this with other equipment (since the time the original TinySA lacked the resolution for doing this using the ARRL specs), but they might still be of some help in understanding the overall process.
?
?
hopefully this is not confusing the issue...
?
M
?
?
